Barrel Whip

[Orange Dust]

My experience in building aircraft with composite materials tells me that the strength is not in the resin, it is in the resin-impregnated carbon fiber. If you can get some carbon fiber strands, soak them in resin, then lay them into the space below the barrel channel, you should be able to stiffen the stock appreciably. But just pouring resin into that space will not be as useful.

Be very careful with this stuff and don't let it touch your skin or sand it. The tiny strands easily penetrate skin and are nearly impossible to get out. Don't ask how I know.....

 

[no1cr500racer]

In my opinion "NO" Normally the bullet has left the barrel before the rifle reacts to recoil. The difference In POI shifts are normally the Inconsistency in the shooters hold/position. The lead sled is a good tool for testing the accuracy of your loads and the rifle. once you get the desired accuracy, it is recommended that you shoot the rifle like you would hunt with it to verify the zero. If you are not adding stress to the rifle because of your position, there should be little if any change in zero.

J E CUSTOM

That sounds like solid information, I suppose it comes down to a accurate load in the sled, and test it on the shoulder next, Thanks

 

[cohunt]

In my opinion "NO" Normally the bullet has left the barrel before the rifle reacts to recoil. The difference In POI shifts are normally the Inconsistency in the shooters hold/position. The lead sled is a good tool for testing the accuracy of your loads and the rifle. once you get the desired accuracy, it is recommended that you shoot the rifle like you would hunt with it to verify the zero. If you are not adding stress to the rifle because of your position, there should be little if any change in zero.

J E CUSTOM

I agree, and to add on to that--a bullet only spends (on average) .0007 seconds inside the barrel before it exits-- i am not sure how long it takes the recoil action to happen, or metal flex/barrel whip to start but that is a very short span of time.
Now according to Newtons 3rd law (equal and opposite reaction) the recoil forces would immediately be transferred into the rifle, but there are so many parts of a rifle that absorb these forces and flex (such as--barrel whip, action flex, stock flex, shooters shoulder flex, etc) that it pretty much shows that the bullet is far gone from the barrel before these "reactions" start happening.. what people need to watch for is "other stresses" they put on the rifle when in field positions that could change the poi-- when offhand, people often will push or pull on the rifle forearm, when prone and resting on a pack or bi-pod there is often an upward or downward pressure on the forearm-- in my opinion it is these "extra stresses" that cause the largest shift in POI (and the shooters eye position behind the scope in off positions)

 

[carl1775]

Now according to Newtons 3rd law (equal and opposite reaction) the recoil forces would immediately be transferred into the rifle, but there are so many parts of a rifle that absorb these forces and flex (such as--barrel whip, action flex, stock flex, shooters shoulder flex, etc) that it pretty much shows that the bullet is far gone from the barrel before these "reactions" start happening..

This is kinda correct and kind of not. The opposite and equal reaction is immediate, to the projectile being launched. The culprit at hand and which lends itself to "barrel whip" is resonance. How long and where the shock waves occur and at which point/s they most greatly affect.

 

[J E Custom]

That sounds like solid information, I suppose it comes down to a accurate load in the sled, and test it on the shoulder next, Thanks

In all of the many slow motion test of muzzle brakes and recoil, no perceivable movement was seen in the rifles. Recoil starts immediately
but it builds up in the firearm until it can overcome the mass of the rifle and react (Move). Some movement does occur in pistols before the bullet clears the weapon due to weight and design but can normally be dealt with.

I have also not seen any real shift in POI from using a Lead sled for a test bed. I only recommend that a person verify the zero under hunting conditions to be prudent in the event it did change.

Personally, I have never had to change a load because of the difference in the lead Sled and hunting positions. I have however seen differences when shooting prone using a sling or a bi pod
because of the different induced stresses on the rifle that didn't exist while In the Lead Sled.

The accuracy will still be there but it will depend more on the shooter, the PO Aim may change.

J E CUSTOM